
Originally Posted by
Iraqgunz
So a little follow up to this. Though not directly related this is some data I gathered from today. Maybe I missed it, but I was unable to find an exact weight of the H6 buffer.The Colt H3 buffer is listed as approx. 5.4 oz. Today I took a Colt 6920 upper (same gas port .063 as an M4 carbine) and using a standard GI spring and H3 buffer I successfully ran about 30 round of Federal M193 ammunition through the weapon with ZERO issues. Weather was high 80's, using Slip2000 lubricant and a standard full auto carrier and FN military contract bolt with copper spring and black insert.
For those worried about ejection patterns it was pretty consistent at about 300 o'clock. Since I already knew an H2 would work, based on other testing I skipped the BS and went straight to the H3. Obviously with full auto and burst it could be different, but since we know that the M855A1 is hotter something tells me that it is going to work just fine.
I have also built (2) M16A2 configuration uppers and when using the carbine lower receiver extension and a blue Sprinco spring with the H3 buffer and they also cycled with several types of ammunition with ZERO issues.
Thanks Gunz for confirming these findings.
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